mirror of
https://github.com/nyanmisaka/mpp.git
synced 2025-10-31 12:36:44 +08:00
9e77264edc
Signed-off-by: Herman Chen <herman.chen@rock-chips.com> Change-Id: I46614e90abb132111105720f1cc7d4e2ec71e8c3
73 lines
1.5 KiB
C++
73 lines
1.5 KiB
C++
/*
|
|
* Copyright 2015 Rockchip Electronics Co. LTD
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <poll.h>
|
|
#include <sys/eventfd.h>
|
|
|
|
#include "mpp_eventfd.h"
|
|
|
|
RK_S32 mpp_eventfd_get(RK_U32 init)
|
|
{
|
|
RK_S32 fd = eventfd(init, 0);
|
|
|
|
if (fd < 0)
|
|
fd = errno;
|
|
|
|
return fd;
|
|
}
|
|
|
|
RK_S32 mpp_eventfd_put(RK_S32 fd)
|
|
{
|
|
if (fd >= 0)
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
RK_S32 mpp_eventfd_read(RK_S32 fd, RK_U64 *val, RK_S64 timeout)
|
|
{
|
|
RK_S32 ret = 0;
|
|
struct pollfd nfds;
|
|
RK_U64 tmp = 0;
|
|
|
|
if (NULL == val)
|
|
val = &tmp;
|
|
|
|
nfds.fd = fd;
|
|
nfds.events = POLLIN;
|
|
|
|
ret = poll(&nfds, 1, timeout);
|
|
if (ret == 1 && (nfds.revents & POLLIN) &&
|
|
sizeof(RK_U64) == read(fd, val, sizeof(RK_U64))) {
|
|
ret = 0;
|
|
} else
|
|
ret = errno;
|
|
|
|
return ret;
|
|
}
|
|
|
|
RK_S32 mpp_eventfd_write(RK_S32 fd, RK_U64 val)
|
|
{
|
|
RK_S32 ret = 0;
|
|
|
|
if (sizeof(RK_U64) != write(fd, &val, sizeof(val)))
|
|
ret = errno;
|
|
|
|
return ret;
|
|
}
|